QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

10 km ESE of Gracemont, Oklahoma

· 12 km deep · released about 47 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Caddo County 21 kmGrady County 29 kmCanadian County 45 kmComanche County 63 kmMcClain County 66 kmCleveland County 75 kmWashita County 78 kmOklahoma County 80 kmKiowa County 80 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 2.1 (ml)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Caddo County, 21 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 99 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 47 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 lb of TNT

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 35.1645, -98.1497. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Caddo County, OK 21 km (13 mi) E of here earthquakes near Caddo County
Grady County, OK 29 km (18 mi) NW of here earthquakes near Grady County
Canadian County, OK 45 km (28 mi) SSW of here earthquakes near Canadian County
Comanche County, OK 63 km (39 mi) NNE of here earthquakes near Comanche County
McClain County, OK 66 km (41 mi) WNW of here earthquakes near McClain County
Cleveland County, OK 75 km (47 mi) W of here earthquakes near Cleveland County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

32 earthquakes have been recorded within 50 km since this one.

  1. 1.3 5 km ESE of Chickasha, Oklahoma
  2. 0.9 5 km SE of Chickasha, Oklahoma
  3. 0.9 9 km ESE of Hinton, Oklahoma
  4. 1.5 9 km ESE of Hinton, Oklahoma
  5. 3.3 2 km SSW of Dibble, Oklahoma
  6. 1.6 1 km S of Dibble, Oklahoma
  7. 1.5 2 km SW of Dibble, Oklahoma
  8. 2.0 1 km SW of Dibble, Oklahoma
  9. 1.8 6 km SE of Chickasha, Oklahoma
  10. 1.6 9 km SSE of Amber, Oklahoma
  11. 1.6 5 km SSE of Amber, Oklahoma
  12. 2.4 6 km S of Amber, Oklahoma
  13. 1.7 7 km ENE of Gracemont, Oklahoma
  14. 1.8 9 km ESE of Hinton, Oklahoma
  15. 1.6 10 km ESE of Hinton, Oklahoma

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.